Argentina was one of the richest on a per-capita basis, ahead of France, Germany, and Italy. India was never rich on a per-capita basis:
https://www.livemint.com/Opinion/Nb7KkZ3yOVSNW3vHf9K1oM/Worl.... For example during Roman times India had a lower GDP per capita than Italy, and it remained at basically the same level until the 20th century.